The errors are in steps 4 and 5. Step 4 would be that angle 1 is supplementary to angle 8, and step 5 would be that angles 3 and 5 are congruent because they are alternate interior angles.
Answer:
<em>135k</em>
Step-by-step explanation:
<em>9k*8k=72k</em>
<em>9k*7=63k</em>
<em>72k+63k=135k</em>
37
(4)(7)+(9)
(28)+9
